Issues with 12amp Hercules SDS Max Hammer Drill

I bought the drill to get rid of the concrete from an old wash line post. I used all three settings, with respective bits and it worked flawlessly. I also used it a second time to drill through my brick house for a new hose bib. Went to use it today and it would not go into drill mode. Hammer mode? Fine. Hammer drill? Fine. Nothing on just drill. So I took it back to HF and they exchanged for a new one. Get home and it’s LITERALLY DOING THE SAME THING. I had two contractors at my house working on other things and even asked them if I was going crazy. What is going on? Should I exchange again? Is it a common and fixable issue?

TLDR: Won’t go into just drill mode.